Do the characters smile and join in the mockery when they watch a play in which a religious character is ridiculed, while in reality they are not religious?

Islam has forbidden mocking and ridiculing people and has prohibited watching or listening to those who engage in such acts. A Muslim must avoid mockery whether serious or jesting, and stay away from TV series that do not adhere to Islamic manners. As for smiling when watching such scenes, it is not considered mockery unless it stems from approval or endorsement.